Giant Brunner's gland hyperplasia of the duodenum successfully resected en bloc by endoscopic mucosal resection: A case report

Figure 6 Pathological findings of the lesion. A: The lesion size after formalin fixation was 6 cm × 3.5 cm × 3 cm; B: Histopathological examination revealed nodular proliferation of Brunner's glands without atypia, partitioned by fibrous septa; C: This site exhibited positive staining for MUC6; D: The area observed as a depressed region during EGD showed superficial erosion and regenerating epithelium; E: At the resection margin, thickened muscularis mucosa, fibrosis in the submucosal layer, and normal Brunner's glands were observed.